projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 28f540f4 RM |
1 | /* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 17 | Cambridge, MA 02139, USA. */ | |
| 18 | ||
| 19 | #include <ansidecl.h> | |
| 20 | #include <errno.h> | |
| 21 | #include <unistd.h> | |
| 22 | #include <sys/types.h> | |
| 23 | #include <hurd.h> | |
| 24 | #include <hurd/id.h> | |
| 25 | #include <string.h> | |
| 26 | ||
| 27 | /* Set the user ID of the calling process to UID. | |
| 28 | If the calling process is the super-user, the real | |
| 29 | and effective user IDs, and the saved set-user-ID to UID; | |
| 30 | if not, the effective user ID is set to UID. */ | |
| 31 | int | |
| 32 | DEFUN(__setuid, (uid), uid_t uid) | |
| 33 | { | |
| 34 | auth_t newauth; | |
| 35 | error_t err; | |
| 36 | ||
| 37 | HURD_CRITICAL_BEGIN; | |
| 38 | __mutex_lock (&_hurd_id.lock); | |
| 39 | err = _hurd_check_ids (); | |
| 40 | ||
| 41 | if (!err) | |
| 42 | { | |
| 43 | /* Make a new auth handle which has UID as the real uid, | |
| 44 | and as the first element in the list of effective uids. */ | |
| 45 | ||
| 46 | uid_t newgen[_hurd_id.gen.nuids + 1]; | |
| 47 | uid_t newaux[_hurd_id.aux.nuids]; | |
| 48 | ||
| 49 | newgen[0] = uid; | |
| 50 | memcpy (&newgen[1], _hurd_id.gen.uids, | |
| 51 | _hurd_id.gen.nuids * sizeof (uid_t)); | |
| 52 | newaux[0] = uid; | |
| 53 | memcpy (&newaux[1], _hurd_id.aux.uids, | |
| 54 | (_hurd_id.aux.nuids - 1) * sizeof (uid_t)); | |
| 55 | ||
| 56 | err = __USEPORT (AUTH, __auth_makeauth | |
| 46bdf16b | 57 | (port, NULL, MACH_MSG_TYPE_COPY_SEND, 0, |
| 28f540f4 RM |
58 | _hurd_id.gen.uids, _hurd_id.gen.nuids, |
| 59 | _hurd_id.aux.uids, _hurd_id.aux.nuids, | |
| 60 | newgen, 1 + _hurd_id.gen.nuids, | |
| 61 | newaux, _hurd_id.aux.nuids, | |
| 62 | &newauth)); | |
| 63 | } | |
| 64 | __mutex_unlock (&_hurd_id.lock); | |
| 65 | HURD_CRITICAL_END; | |
| 66 | ||
| 67 | if (err) | |
| 68 | return __hurd_fail (err); | |
| 69 | ||
| 70 | /* Install the new handle and reauthenticate everything. */ | |
| 71 | err = __setauth (newauth); | |
| 72 | __mach_port_deallocate (__mach_task_self (), newauth); | |
| 73 | return err; | |
| 74 | } | |
| 75 | ||
| 76 | weak_alias (__setuid, setuid) |